Table 5. Multivariate analysis of the demographic and clinical characteristics that were associated with MCs.

Type	Gender		Weight			Work
	Male	Female	Normal weight	Over- weight	Obese	Light physical	Moderate physical	Hard physical
Modic I	6	10	7	6	3	2	6	8
Modic II	8	17	10	5	10	6	10	9
Modic III	2	4	0	3	3①	0	0	6②
Total	16	31	17	14	16	8	16	23

① The obese patients were more vulnerable to Type III MCs (P < 0.05).

② The patients in the hard physical work group were also more prone to Type III MCs.